Dating from between 4000 BC and 2500 BC, these burial chambers are hidden in long, low mounds rising from an evocatively lonely moor. The Long Cairn measures 60m by 21m. You can enter the main chamber, but must first crawl into the well-preserved Round Cairn, which has a corbelled ceiling. From a turn-off a mile east of Lybster on the A99, the cairns are 4 miles north. You can continue 7 further miles to approach Wick on the A882.